421040342 has 8 divisors (see below), whose sum is σ = 664800600. Its totient is φ = 199440144.

The previous prime is 421040339. The next prime is 421040381. The reversal of 421040342 is 243040124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5539967 + ... + 5540042.

It is an arithmetic number, because the mean of its divisors is an integer number (83100075).

Almost surely, 2^421040342 is an apocalyptic number.

421040342 is a deficient number, since it is larger than the sum of its proper divisors (243760258).

421040342 is a wasteful number, since it uses less digits than its factorization.

421040342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11080030.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 421040342 is about 20519.2675795214. The cubic root of 421040342 is about 749.5050613046.

Adding to 421040342 its reverse (243040124), we get a palindrome (664080466).

The spelling of 421040342 in words is "four hundred twenty-one million, forty thousand, three hundred forty-two".